8+2x=5x-22
-2x -2x
8=3x-22
+22 +22
30=3x
3x=30
x= 30/3
x=10
So you reversed the subtraction a bit; the equation you're gonna be solving is

.
First step ya gonna do is to reverse the + and - symbols in the trinomial thats in the parentheses so your equation looks like

Now just combine like terms and your answer should be